导热辊内部孔道结构及其在锂电池极片轧制中的应用问题研究  

Research on the Internal Pore Structure of Thermal Roller and Its Application in Lithium Battery Pole Rolling

作　　者：黄凤祥 HUANG Feng-xiang(School of Engineering,Xianning Vocational Technical College,Xianning 437100,China)

机构地区：[1]咸宁职业技术学院工学院,湖北咸宁437100

出　　处：《湖北科技学院学报》2024年第6期147-153,共7页Journal of Hubei University of Science and Technology

摘　　要：为进一步提高锂电池极片的压实密度,在轧制过程中软化极片表面的活性物质、增加极片的柔软和可塑性,可以用来提高电池的能量密度和循环寿命。在对锂电池导热辊的研究中,使用ANSYS软件进行计算和建模,以企业常采用的9Cr2Mo合金钢材料的导热辊为对象,对距离辊面50mm、70mm、90mm等3种不同距离导热辊的油孔开孔及其位置分布方式进行研究,综合考虑导热辊的加工性能、应力集中分布、导热性等多因素进行计算分析,得到油孔距辊面50mm为最佳距离。通过实践,距离辊面50mm导热辊可以使常规钴酸锂、三元材料、磷酸铁锂材料的极片在正常范围内得到较高的压实密度,有效提高电池的容量和充放电效率。In order to improve the compaction density of lithium battery electrodes,the active materials on the surface of the electrode are softened during the rolling process to increase the softness and plasticity of the electrode,which improves the energy density and cycle life of the battery.In studying the heat transfer rollers of lithium battery,ANSYS software was used for calculation and modeling.Taking the 9Cr2Mo alloy steel material commonly used by enterprises as the object of heat transfer rollers,the paper studies the oil hole openings and their position distribution at three different distances from the roller surface,namely,50mm,70mm,and 90mm.Taking into account multiple factors such as the processing performance,stress concentration distribution,and thermal conductivity of the heat transfer roller,the study finds that the optimal distance between the oil hole and the roller surface is 50mm.In the practice,a heat conducting roller with a distance of 50mm from the roller surface can achieve high compaction density of conventional lithium cobalt oxide,ternary materials,and lithium iron phosphate materials within the normal range,and effectively improve the capacity and charge-discharge efficiency of the battery.

关 键 词：导热辊 锂电池极片 压实密度 极片轧制 

分 类 号：TG333.71[金属学及工艺—金属压力加工]